Notes
Total of 12.2 miles, Out-n-Back with 9 miles at near GMP: 7:03 avg OUT, 6:53 avg BACK. Solid workout!
Also, I tried Hammer Perpetuem Orange Vanilla flavor. One bottle (other bottle was water). Seemed good. Taste is very mild, very slightly chalky, but not nearly as much as the Gen UCan stuff. Hard to know how well it would work in a marathon, but it seems promising.